Upgrade to chartjs v4 and fix bugs (#170)

* Upgrade to chartjs v4 and fix bugs

* Use node LTS

* Fix tests

* Fix coverage

* Add Firefox tests

* Reduce complexity

* Replace var

* Fixed html indentation as per PR comments

* Update docs/index.html

Co-authored-by: Ben McCann <322311+benmccann@users.noreply.github.com>

* Fixed doc comments indentation

* Fixed html indentation as per PR comments

* Added info on README

---------

Co-authored-by: Ben McCann <322311+benmccann@users.noreply.github.com>

.eslintrc.yml

@@ -1,35 +1,61 @@
 extends:
   - chartjs
-  - plugin:es/no-new-in-es2019
+  - plugin:es/restrict-to-es2018
+  - plugin:markdown/recommended
+
+settings:
+  es:
+    aggressive: true
 
 env:
   es6: true
   browser: true
-  jasmine: true
   node: true
 
 parserOptions:
-  ecmaVersion: 2018
+  ecmaVersion: 2022
   sourceType: module
   ecmaFeatures:
     impliedStrict: true
     modules: true
-    experimentalObjectRestSpread: true
 
 plugins: ['html', 'es']
 
-
 rules:
   class-methods-use-this: "off"
   complexity: ["warn", 10]
-  indent: ["error", "tab"]
   max-statements: ["warn", 30]
   no-empty-function: "off"
   no-use-before-define: ["error", { "functions": false }]
   # disable everything, except Rest/Spread Properties in ES2018
+  es/no-import-meta: "off"
   es/no-async-iteration: "error"
   es/no-malformed-template-literals: "error"
   es/no-regexp-lookbehind-assertions: "error"
   es/no-regexp-named-capture-groups: "error"
   es/no-regexp-s-flag: "error"
   es/no-regexp-unicode-property-escapes: "error"
+  es/no-dynamic-import: "off"
+
+overrides:
+  - files: ['**/*.ts']
+    parser: '@typescript-eslint/parser'
+    plugins:
+      - '@typescript-eslint'
+    extends:
+      - chartjs
+      - plugin:@typescript-eslint/recommended
+
+    rules:
+      complexity: ["warn", 10]
+      max-statements: ["warn", 30]
+      # Replace stock eslint rules with typescript-eslint equivalents for proper
+      # TypeScript support.
+      indent: "off"
+      "@typescript-eslint/indent": ["error", 2]
+      no-use-before-define: "off"
+      '@typescript-eslint/no-use-before-define': "error"
+      no-shadow: "off"
+      '@typescript-eslint/no-shadow': "error"
+      space-before-function-paren: "off"
+      '@typescript-eslint/space-before-function-paren': [2, never]

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '14'
+          node-version: 'lts/*'
           cache: npm
       - uses: dorny/paths-filter@v3
         id: changes

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: '14.x'
+          node-version: 'lts/*'
           registry-url: https://registry.npmjs.org/
           cache: npm
       - name: Setup and build

README.md

@@ -18,6 +18,8 @@ Chart.js 2.9.0 added [improved autoskipping](https://github.com/chartjs/Chart.js
 
 Chart.js 3.0.0 removed the need for custom scales, which means logarithmic scale is now supported. It also has numerous performance improvements.
 
+Chart.js 4.0.0 has some breaking changes that required modifying this library configuration. Check the updated examples to see which changes are necessary.
+
 ## Comparison
 
 We are aiming to make Chart.js the only popular JavaScript library that is both performant and has good timescale handling.